org.lwjgl.opencl

Class APPLEBiasedFixedPointImageFormats

java.lang.Object

org.lwjgl.opencl.APPLEBiasedFixedPointImageFormats

public final class APPLEBiasedFixedPointImageFormats
extends java.lang.Object

Native bindings to the APPLE_biased_fixed_point_image_formats extension.

This selector may be passed to CreateImage2D in the cl_image_format.image_channel_data_type field. It defines a biased signed 1.14 fixed point storage format, with range [-1, 3). The conversion from float to this fixed point format is defined as follows:

 ushort float_to_sfixed14( float x ){
     int i = convert_int_sat_rte( x * 0x1.0p14f );         // scale [-1, 3.0) to [-16384, 3*16384), round to nearest integer
     i = add_sat( i, 0x4000 );                             // apply bias, to convert to [0, 65535) range
     return convert_ushort_sat(i);                         // clamp to destination size
 }

The inverse conversion is the reverse process. The formats are currently only available on the CPU with the RGBA channel layout.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CL_BIASED_HALF_APPLE
static int	CL_SFIXED14_APPLE

Method Summary

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CL_SFIXED14_APPLE

public static final int CL_SFIXED14_APPLE

See Also:

Constant Field Values

CL_BIASED_HALF_APPLE

public static final int CL_BIASED_HALF_APPLE

See Also:

Constant Field Values